Detlev Dipl.-Ing. Böttger

Program-controlled telecommunication-system with the option of automatic call-back

Method for time-monitoring program execution

Method for updating system configuration data and individual user data in a switching exchange

Method for storing a country-specific data-configuration in a communication system

Method for realizing a service-specific command procedure in a calculator-controlled communication system, especially a key telephone system, with the possibility of breaking-in

Method for putting into operation an interface allocatable to different transmission links in a program controlled communication system

Method for realizing a control procedure in combination with the realisation of a hold state of a line in a calculator-controlled communication system, especially a key telephone system

Method for improving the operation of a program controlled communication system

Method for a pick-up facility in a communication system

Method for a calculator-controlled switching device, especially for a key-telephone exchange, in which data and telephone terminals are connectible alternatively